Mercurial > dive4elements > river
diff gwt-client/src/main/java/org/dive4elements/river/client/server/GetArtifactServiceImpl.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Thu, 25 Apr 2013 15:23:37 +0200 |
parents | flys-client/src/main/java/org/dive4elements/river/client/server/GetArtifactServiceImpl.java@821a02bbfb4e |
children | 172338b1407f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gwt-client/src/main/java/org/dive4elements/river/client/server/GetArtifactServiceImpl.java Thu Apr 25 15:23:37 2013 +0200 @@ -0,0 +1,87 @@ +package org.dive4elements.river.client.server; + +import org.w3c.dom.Document; + +import org.apache.log4j.Logger; + +import com.google.gwt.user.server.rpc.RemoteServiceServlet; + +import org.dive4elements.artifacts.common.ArtifactNamespaceContext; +import org.dive4elements.artifacts.common.utils.ClientProtocolUtils; +import org.dive4elements.artifacts.common.utils.XMLUtils; + +import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException; +import org.dive4elements.artifacts.httpclient.http.HttpClient; +import org.dive4elements.artifacts.httpclient.http.HttpClientImpl; +import org.dive4elements.artifacts.httpclient.http.response.DocumentResponseHandler; + +import org.dive4elements.river.client.shared.exceptions.ServerException; +import org.dive4elements.river.client.shared.model.Artifact; +import org.dive4elements.river.client.client.services.GetArtifactService; + + +/** + * This service provides a method that returns an artifact based on its + * identifier. + * + * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> + */ +public class GetArtifactServiceImpl +extends RemoteServiceServlet +implements GetArtifactService +{ + private static final Logger logger = + Logger.getLogger(GetArtifactServiceImpl.class); + + + public static final String ERROR_DESCRIBE_ARTIFACT = + "error_describe_artifact"; + + public static final String XPATH_RESULT = "/art:result/text()"; + + public static final String OPERATION_FAILURE = "FAILED"; + + + public Artifact getArtifact( + String locale, + String uuid, + String hash) + throws ServerException + { + logger.info("GetArtifactServiceImpl.getArtifact"); + + String url = getServletContext().getInitParameter("server-url"); + + Document describe = ClientProtocolUtils.newDescribeDocument( + uuid, hash, true); + + HttpClient client = new HttpClientImpl(url, locale); + + try { + Document description = (Document) client.describe( + new org.dive4elements.artifacts.httpclient.objects.Artifact( + uuid, hash), + describe, + new DocumentResponseHandler()); + + if (description == null) { + throw new ServerException(ERROR_DESCRIBE_ARTIFACT); + } + + String result = XMLUtils.xpathString( + description, + XPATH_RESULT, + ArtifactNamespaceContext.INSTANCE); + + if (result == null || !result.equals(OPERATION_FAILURE)) { + return (Artifact) new FLYSArtifactCreator().create(description); + } + } + catch (ConnectionException ce) { + logger.error(ce, ce); + } + + throw new ServerException(ERROR_DESCRIBE_ARTIFACT); + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :